1. Verify the New Pump is Working:
* Listen for the pump: Turn the ignition key to the "ON" position (don't crank the engine). You should hear a brief humming sound from the fuel pump in the fuel tank. This is the "prime" cycle. If you don't hear it, the pump might be faulty, wired incorrectly, or there's a problem with the fuel pump relay or fuse.
* Check the fuel pressure: A fuel pressure gauge is the definitive way to check if fuel is being delivered. This requires connecting the gauge to the fuel system (usually at a test port on the fuel rail). The pressure should be within the manufacturer's specifications for your engine. A low or no pressure reading indicates a problem even with a new pump.
2. Beyond the Pump Itself:
* Fuel pump relay: A bad relay will prevent the pump from receiving power. Locate the fuel pump relay (consult your owner's manual or an online repair manual) and try swapping it with a known good relay of the same type (sometimes relays are interchangeable, but check carefully!).
* Fuel pump fuse: Similarly, a blown fuse will stop the pump. Check the fuse box (again, your owner's manual is your friend) for a blown fuse associated with the fuel pump.
* Wiring: Check the wiring harness to the fuel pump for any damage, corrosion, or loose connections. This can be difficult to access and may require removing parts of the car's interior or undercarriage.
* Fuel filter: A clogged fuel filter can restrict fuel flow even with a new pump. Replace the fuel filter if it hasn't been done recently.
* Crankshaft Position Sensor (CKP): A faulty CKP sensor won't allow the engine to start even if fuel is present.
* Cam Position Sensor (CMP): Similar to the CKP, a bad CMP sensor can prevent starting.
* Ignition System: Problems with the ignition coil, spark plugs, wires, or distributor (if equipped) can also prevent starting.
3. Other Possibilities:
* Immobilizer System: Some 1997 Intrepids have an immobilizer system. If the key isn't properly recognized, the car won't start.
* Bad Fuel: It's possible that you have bad gas in the tank, especially if the car sat for a while before the pump replacement.
Important Safety Note: Work on fuel systems can be dangerous. Fuel is flammable, and pressurized fuel lines can cause injury. If you're not comfortable working on fuel systems, take the car to a qualified mechanic.
Troubleshooting Steps:
1. Start with the simple checks: Listen for the pump, check the fuse and relay.
2. Check fuel pressure: This is the most definitive test for pump function.
3. Address other potential causes systematically: If the pressure is low or absent, move to checking the wiring, filter, and then the ignition system.
Without further details on what's happening (e.g., does the engine crank but not start? Are there any error codes?), it's impossible to give a more precise diagnosis. A repair manual specific to your 1997 Dodge Intrepid will be invaluable in this process.
